Question

a light body and a heaavy body have the same momentum.which will have greater kinetic energy?

Answer 1

Heavy body will have greater momentum because kinetic energy is directly proportional to under root Mass.

Answer 2

Momentum is defined as the product of mass and velocity. 

p= mv

Kinetic energy= p^2/2m
 
From this formula we get that kinetic energy and mass of the body are inversely proportional, so light body has greater momentum.

hope it helps you.....